GB1290275A - - Google Patents
Info
- Publication number
- GB1290275A GB1290275A GB1290275DA GB1290275A GB 1290275 A GB1290275 A GB 1290275A GB 1290275D A GB1290275D A GB 1290275DA GB 1290275 A GB1290275 A GB 1290275A
- Authority
- GB
- United Kingdom
- Prior art keywords
- film
- zone
- heaters
- april
- inflation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/28—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of blown tubular films, e.g. by inflation
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
1290275 Inflating tubular film SHOWA DENKO KK 19 April 1971 [3 April 1970] 25596/71 Heading B5B In a process for biaxially orienting a tubular film by inflation, the film, e.g. of polypropylene, is passed through a chamber 2 comprising a preheating zone 4 constructed as a plurality of stepped zones 14, 15 of different diameter and located above a stretching zone 6. The film in transit through zones 14, 15 is heated indirectly, e.g. by I.R. heaters 5 and also by hot gas rising from zone 6. Sizing rings 11, 12 and 8 may control the film path and a further ring 13 may prevent the point of inflation rising too far up the tube. Ring 13 may additionally be heatable, e.g. having gas supply ducts, heated film-contacting rollers or individual I.R. heaters, whereby localized film-heating may be effected to control thickness variations.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2786470A JPS5018514B1 (en) | 1970-04-03 | 1970-04-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1290275A true GB1290275A (en) | 1972-09-27 |
Family
ID=12232757
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1290275D Expired GB1290275A (en) | 1970-04-03 | 1971-04-19 |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPS5018514B1 (en) |
| CA (1) | CA944911A (en) |
| DE (1) | DE2116061C3 (en) |
| FR (1) | FR2085837B1 (en) |
| GB (1) | GB1290275A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5586718A (en) * | 1978-12-25 | 1980-06-30 | Chisso Eng Kk | Manufacturing device for tubular biaxial stretching film |
| EP0142948A3 (en) * | 1983-10-24 | 1985-10-09 | Teijin Limited | Production of thin-walled cylindrical body of aromatic polyester |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL260970A (en) * | 1960-02-08 | 1900-01-01 | ||
| NL281373A (en) * | 1961-07-28 | |||
| GB1092948A (en) * | 1963-12-21 | 1967-11-29 | Seikisui Chemical Co Ltd | Improvements in the stretching of tubular film |
| GB1107354A (en) * | 1965-05-04 | 1968-03-27 | Bakelite Xylonite Ltd | Improvements in and relating to biaxially oriented film |
| CH470955A (en) * | 1968-03-01 | 1969-04-15 | Lonza Ag | Process for the production of biaxially oriented tubular films |
| GB1282062A (en) * | 1969-03-08 | 1972-07-19 | Showa Denko Kk | A method and apparatus for manufacturing a biaxially oriented cylindrical film |
-
1970
- 1970-04-03 JP JP2786470A patent/JPS5018514B1/ja active Pending
-
1971
- 1971-03-30 CA CA109,087A patent/CA944911A/en not_active Expired
- 1971-04-02 DE DE19712116061 patent/DE2116061C3/en not_active Expired
- 1971-04-05 FR FR7111966A patent/FR2085837B1/fr not_active Expired
- 1971-04-19 GB GB1290275D patent/GB1290275A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR2085837A1 (en) | 1971-12-31 |
| DE2116061C3 (en) | 1982-01-14 |
| DE2116061A1 (en) | 1971-10-21 |
| JPS5018514B1 (en) | 1975-06-30 |
| DE2116061B2 (en) | 1981-05-07 |
| FR2085837B1 (en) | 1974-02-15 |
| CA944911A (en) | 1974-04-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |